RFR: 8343478: Remove unnecessary @SuppressWarnings annotations (core-libs) [v6]

[Archie Cobbs]

> Please review this patch which removes unnecessary `@SuppressWarnings` annotations.

Archie Cobbs has updated the pull request incrementally with one additional commit since the last revision:

  Remove more unnecessary warning suppressions.

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/21852/files
  - new: https://git.openjdk.org/jdk/pull/21852/files/300c0f98..378ca601

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21852&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21852&range=04-05

  Stats: 2 lines in 2 files changed: 0 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21852.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21852/head:pull/21852

PR: https://git.openjdk.org/jdk/pull/21852